Size Reduction MCQs : This section focuses on the "Size Reduction". These Multiple Choice Questions (MCQs) should be practiced to improve the Size Reduction skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
4 screens can separate _____ differently sized particles.
A. 3
B. 4
C. 5
D. 6
Question 2
A ball mill uses _____
A. Impact
B. Attrition
C. Impact & Attrition
D. None of the mentioned
Question 3
A jaw crusher uses _____
A. Compression
B. Shear
C. Cutting
D. None of the mentioned
Question 4
Gyratory screens are used when it is a continuous operation to be handled and the amount of material to be handled is very high.
A. TRUE
B. FALSE
Question 5
In differential screen analysis, for calculating the particle size of the food particles on any one sieve, the average food particle size on that sieve is the mean of the screen opening of that sieve and the sieve below it.
A. TRUE
B. FALSE
Question 6
Kick's law is an intermediate between rittinger's law and bond's law.
A. TRUE
B. FALSE
Question 7
Statement 1: As mesh size increases, the aperture size decreases.
A. True, False
B. True, True
C. False, False
D. False, True
Question 8
Stationary screens can be used for wet particles.
A. TRUE
B. FALSE
Question 9
The overall effectiveness of sieve equipment is the _____ of the effectiveness of the underflow and the overflow separately.
A. Addition
B. Multiplication
C. Difference
D. Division
Question 10
Which of the following food operation does NOT use the principle of size reduction for its operation?
A. Slaughtering of birds for food
B. Trimming of fish to remove inedible portions
C. Mincing of meat
D. None of the mentioned
Question 11
Which of the following is an advantage of size reduction?
A. Enhanced heat/mass transfer
B. Intimate contact with certain food items
C. Enhanced heat/mass transfer & intimate contact with certain food items
D. None of the mentioned
Question 12
Which of the following is NOT a reason to affect the effectiveness of a screen?
A. Broken mesh wires
B. Insufficient time for food particles to pass through the sieve
C. Blocked apertures
D. None of the mentioned
Question 13
Which of the following is NOT true with respect to size reduction?
A. Size reduction is an energy inefficient process as the energy required for grinding is very high
B. Some of the energy liberated in the formation of new small surfaces is the grinding energy required by food material per unit surface area to form new surface areas and the rest is generally just heat
C. The crushing efficiency is inversely proportional to the surface created
D. None of the mentioned
Question 14
Which of the following is used for shredding meat in the food industry?
A. Ball mill
B. Hammer mill
C. Knife cutter
D. All of the mentioned
Question 15
Which of the following uses attrition?
A. Ball mill
B. Plate mill
C. Roller mill
D. All of the mentioned
Question 16
With respect to the Tyler series, which of the following is true?
A. The ratio of one mess size to the intermediate mesh will have the ratio of 4th root of 2
B. Intermediate messes cannot be accommodated in the Tyler series
C. Intermediate meshes can be accommodated in British series only
D. None of the mentioned
Question 17
According to Kick, the work required for crushing a mass of material is ____
A. Zero
B. Constant
C. Unity
D. Infinite
Question 18
According to Rittingers law, work required is proportional to _________
A. Energy Consumed
B. Surface area created
C. Final Volume
D. Initial feed
Question 19
Following Rittingers law, Crushing efficiency is ____
A. Independent of feed material
B. Independent of size of feed and product
C. Independent of energy consumed
D. Independent of area
Question 20
Kick’s law holds well for ____
A. Fine crushing
B. Simple crushing
C. Full crushing
D. Coarse crushing
Question 21
On which of the given, Kick’s law is based?
A. Cumulative analysis
B. Frequency analysis
C. Stress analysis
D. Screen analysis
Question 22
Rittingers law is applicable only when _____
A. New particles are created
B. New surface area is created
C. Energy is created
D. Energy is absorbed
Question 23
The ratio of initial particle size to final particle size is defined as _____
A. Reduction ratio
B. Kick’s ratio
C. Rittingers ratio
D. Bond’s ratio